Stockholders' Equity - Additional Information (Detail)	12 Months Ended
	Dec. 29, 2017 USD ($) $ / shares shares
Equity [Abstract]
Stock repurchase program, authorized	$ 10,000,000
Total number of shares repurchased | shares	601,994
Total cost of shares repurchased	$ 3,337,000
Average cost of shares repurchased | $ / shares	$ 5.54